Mortise door-lock.



D. W. WEED.

MORTISE DOOR LOCK.

urnouxon FILED MAB-.10, 1910.

Patented Aug. 9, 1910.

THE nonms Pzrsils 60-, WASHINGTON, n, c,

UNITED STATES PATEN T OFFICE.

DAVID WALTER WEED, OF STAMFORD, CONNECTICT IT, ASSIGNOR 'IO EAGLE LOCK(30.,

OF TERRYVILLE, CONNECTICUT, A CORPORATION.

M ORTISE DOOR-LOCK.

To all whom 'it may concern:

Be it known that I, DAVID WALTER Venn, a citizen ofthe United States,residing at Stamford, in the county of Fairfield and State ofConnecticut, have invented a new and useful Improvement in Mortise Door-Locks; and I do hereby declare the following, when taken in connectionwith the accompanying drawings and the characters of reference markedthereon, to be a full, clear, and exact description of the same, andwhich said drawings constitute part of this specification, andrepresent, in

Figure 1 a view in elevation of a mortise door-lock constructed inaccordance with my invention, with the bolt in its retracted or unlockedposition. Fig. 2 a corresponding view showing the cam at the rear end ofthe plug in the act of throwing the bolt. Fig. 3 a view of the lock invertical transverse section on the line a-b of Fig. 1. Fig. 4 a brokenview in horizontal section on the line 0-(Z of Fig. 1. Fig. 5 an insideperspective view of the talon. Fig. 6 a detached view in side elevationof the thrustplate.

My invention relates to an improvement in mortise door-locks, the objectbeing to reduce the cost and increase the convenience of making locks ofthis description by providing a construction requiring less fitting ofthe parts.

WVith these ends in view, my invention consists in a mortise door-lockhaving certain details of construction and combinations of parts as willbe hereinafter described and pointed out in the claims.

In carrying out my invention, I employ a one-piece pivotal, wedge-shapedtalon 2 having a centrally arranged relatively wide cam-slot 3 whichreceives the tongue 1 of a cam 5 fastened by screws 6 to the inner endof the plug 7 of a pin-tumbler lock the cylin der 8 of which has thesaid plug 7 mounted in it in the usual manner. The said talon 2 isarranged at virtually a right-angle to the longitudinal axis of theshank 9 of the bolt 10, the said shank 9 carrying a heavy stud 11 uponwhich the said talon 2 is swung by the engagement of the opposite wallsof its slot 3 by the opposite edges of the tongue 41 of the cam 5. Theouter end of the talon 2 is curved in contour for clearance and formedon opposite sides of its cam-slot 3 with inwardly extending locking-arms12 Specification of Letters Patent.

Application filed March 10, 1910.

Patented Aug. 9, 1910. Serial No. 548,460.

and 13 formed upon their inner faces with looking bevels letrespectively coacting with corresponding locking-bevels 15 formed at theends of a long, narrow fixed bracket 16 extending parallel with thelock-case 17 and forming a guide for the inner end of the bolt-shank 9the outer edge of which is cut away to clear the boss 18 formed withinthe case 17. The inner face of the said bracket 16 is concaved as at 19for the clearance of the tongue 4 of the cam 5.

A spring 20 interposed between the heel of the talon 2 and the adjacentwall of the case 17 co-acts with the inner corner of the talon andprovides for completing the throw of the talon in either direction, orin other words, for carrying the talon intoits ultimate positions ineither direction after the tongue 1 of the cam 5 has left either one orthe other, as the case may be, of the opposite walls of its cam-slot 3.When the talon reaches the limit of its swinging movement, one or theother of its arms 12 and 13 is hooked over one end or the other of thebracket 16 by the action of the said spring 20, whereby the bolt islocked and prevented from kicking back. As the talon is not carried intoeither of its two ultimate positions by the cam itself, but as thespring 20 is relied upon for this purpose, it is apparent that the partsof the lock do not need to be adjusted with anything like the closenessrequired of the parts of those locks in which the final movement of thetalon is positively eflected as by key-sweeps or other driving surfaces.In other words, the use of the spring 20 to complete the final movementof the talon gives a certain leeway or range of natural adjustment, andalso takes up any play which may result from the construction of theparts. The use of a spring to complete the throw of the talon in eachdirection, as described, prevents the occurrence of what is known askicking back, by which is meant the failure of the cam 5, or whatevercorresponds to it, to throw the bolt 10 into its fully projectedposition, since if the bolt is allowed to stop short of that position,it may, upon the application of pressure to it, be pushed back to thelimit of its retracted position.

For holding the cylinder 8 against rotation and to enable the lock to beconverted from a lock for a right-hand door to a lock for a left-handdoor, and vice versa, as well as to permit two cylinders, if desired, tobeused with one lock, the cylinders are formed atopposite points intheir inner ends with positioning-notches 21 receiving one or the otherof the two fingers or points 22 of a movable block or shoe 23 threadedas at2et for the reception of the threaded stem 25 of a screw-shank 26the outer end of which passes through a hole 27 in the selvage 28covered by the brass scalp 29. The screwsh ank 26. is formed near itsouter end with an annular groove 30 receiving a thrust-plate 31 having aslot 32 adapting it to be slid over the said screw-shank 26 so as toenter the annular groove 30 thereof, the inner end of the plate 31beingentered into a notch 33 in the case 17, while the outer end of the plateenters a notch 34: in the cover 35 of the case. By inserting ascrew-driver into the notch 36 of the shank 26, the stem 25 may beturned so as to advance the block 23 toward the cylinder 8 so as to lockthe same in place. .When the screw is turned in the opposite directionit will draw the head 23 away from the cylinder 8 and permit the same tobe turned, the plate 31 acting as a thrust-plate for the screw. Underthis construction, the liability of breaking the screw in making theadjustmentsrequired in setting the cylinder is reduced to the minimum.

The device above described for holding the cylinder against rotation andto enable the lock to be converted from a lock for a right hand to alock-fora left hand door, and vice versa, has been made the subject of adivisional application filed June 20, 1910, Serial No. 567,885, and istherefore not claimed herein.

I claim .1. In a mortise door-lock, the combination with the boltthereof, of a one-piece talon pivotally mounted upon the shank of thesaid bolt so as to extend at a right-angle thereto, and formed with acam-slot, a cam entering the said slot for swinging the said bolt, aspring for completing the throw of the talon in either direction, andmeans coacting with the said talon for locking the same and hence thebolt in its locked and its unlocked positions.

2. In a mortise door-lock, the combination with the bolt thereof, of aone-piece pivotal talon carried by the said bolt and having a centrallyarranged cam-slot and two locking-arms extending inward from oppositesides of the said slot, a fixed bracket located within the lock-case andhaving at its ends locking bevels coacting with the respective arms ofthe talon, and a spring coacting with the talon to swing the same to thelimit of its movement in either direction.

3. In a mortise door-lock, the combination with the case thereof, of acylinder lock mounted in the said case and having its plug provided atits inner end with a cam, of

a bolt, a one-piece talon pivotally mounted upon the said bolt andhaving a centrally arranged cam-slot for the reception of the said cam,and formed with two inwardly extending arms having locking bevels, abracket fixed in the lock-case and formed at its ends with lockingbevelswith which the locking-hevels of the respective arms of the talon coactto lock the bolt in its locked and unlocked positions, and a springcoacting with the talon to swing the same into its ultimate position ineither direction.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

DAVID \VALTER IVEED.

Vitnesses H. C. CLow, OTIS B. I-IoUoH.

